/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file    usart.c
  * @brief   This file provides code for the configuration
  *          of the USART instances.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2024 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "usart.h"

/* USER CODE BEGIN 0 */
#include "circle_buffer.h"

/* USER CODE END 0 */

UART_HandleTypeDef huart2;
DMA_HandleTypeDef hdma_usart2_rx;
DMA_HandleTypeDef hdma_usart2_tx;

/* USART2 init function */

void MX_USART2_UART_Init(void)
{

  /* USER CODE BEGIN USART2_Init 0 */

  /* USER CODE END USART2_Init 0 */

  /* USER CODE BEGIN USART2_Init 1 */

  /* USER CODE END USART2_Init 1 */
  huart2.Instance = USART2;
  huart2.Init.BaudRate = 115200;
  huart2.Init.WordLength = UART_WORDLENGTH_8B;
  huart2.Init.StopBits = UART_STOPBITS_1;
  huart2.Init.Parity = UART_PARITY_NONE;
  huart2.Init.Mode = UART_MODE_TX_RX;
  huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart2.Init.OverSampling = UART_OVERSAMPLING_16;
  if (HAL_UART_Init(&huart2) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN USART2_Init 2 */

  /* USER CODE END USART2_Init 2 */

}

void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(uartHandle->Instance==USART2)
  {
  /* USER CODE BEGIN USART2_MspInit 0 */

  /* USER CODE END USART2_MspInit 0 */
    /* USART2 clock enable */
    __HAL_RCC_USART2_CLK_ENABLE();

    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**USART2 GPIO Configuration
    PA2     ------> USART2_TX
    PA3     ------> USART2_RX
    */
    GPIO_InitStruct.Pin = GPIO_PIN_2;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    GPIO_InitStruct.Pin = GPIO_PIN_3;
    GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

    /* USART2 DMA Init */
    /* USART2_RX Init */
    hdma_usart2_rx.Instance = DMA1_Channel6;
    hdma_usart2_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
    hdma_usart2_rx.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_usart2_rx.Init.MemInc = DMA_MINC_ENABLE;
    hdma_usart2_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
    hdma_usart2_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
    hdma_usart2_rx.Init.Mode = DMA_CIRCULAR;
    hdma_usart2_rx.Init.Priority = DMA_PRIORITY_LOW;
    if (HAL_DMA_Init(&hdma_usart2_rx) != HAL_OK)
    {
      Error_Handler();
    }

    __HAL_LINKDMA(uartHandle,hdmarx,hdma_usart2_rx);

    /* USART2_TX Init */
    hdma_usart2_tx.Instance = DMA1_Channel7;
    hdma_usart2_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
    hdma_usart2_tx.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_usart2_tx.Init.MemInc = DMA_MINC_ENABLE;
    hdma_usart2_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
    hdma_usart2_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
    hdma_usart2_tx.Init.Mode = DMA_NORMAL;
    hdma_usart2_tx.Init.Priority = DMA_PRIORITY_LOW;
    if (HAL_DMA_Init(&hdma_usart2_tx) != HAL_OK)
    {
      Error_Handler();
    }

    __HAL_LINKDMA(uartHandle,hdmatx,hdma_usart2_tx);

    /* USART2 interrupt Init */
    HAL_NVIC_SetPriority(USART2_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(USART2_IRQn);
  /* USER CODE BEGIN USART2_MspInit 1 */

  /* USER CODE END USART2_MspInit 1 */
  }
}

void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
{

  if(uartHandle->Instance==USART2)
  {
  /* USER CODE BEGIN USART2_MspDeInit 0 */

  /* USER CODE END USART2_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_USART2_CLK_DISABLE();

    /**USART2 GPIO Configuration
    PA2     ------> USART2_TX
    PA3     ------> USART2_RX
    */
    HAL_GPIO_DeInit(GPIOA, GPIO_PIN_2|GPIO_PIN_3);

    /* USART2 DMA DeInit */
    HAL_DMA_DeInit(uartHandle->hdmarx);
    HAL_DMA_DeInit(uartHandle->hdmatx);

    /* USART2 interrupt Deinit */
    HAL_NVIC_DisableIRQ(USART2_IRQn);
  /* USER CODE BEGIN USART2_MspDeInit 1 */

  /* USER CODE END USART2_MspDeInit 1 */
  }
}

/* USER CODE BEGIN 1 */
UART_HandleTypeDef *huart_printf = &huart2;

extern int  sendchar(int ch)
{
	HAL_UART_Transmit(huart_printf, (uint8_t *)&ch, 1,10);
	return ch;
}
extern int  getkey(void)
{
	return 0;
}
static volatile int g_tx_cplt = 0;
static volatile int g_rx_cplt = 0;
//static uint8_t g_RecvChar;
//uint8_t g_RecvTmpBuf[256];
//static uint8_t g_RecvBuf[4096];
//static circle_buf g_uart1_rx_bufs;

//void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
//{
//	if(huart == &huart1)
//	{
//		g_tx_cplt = 1;
//	}
//}

//void Wait_Tx_Complete(void)
//{
//	while (g_tx_cplt == 0);
//	g_tx_cplt = 0;
//}

////void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
////{
////	g_rx_cplt = 1;
////	
////	/* put data to circle buffer */
////	for (int i = 0; i < 10; i++)
////	{
////		circle_buf_write(&g_uart1_rx_bufs, g_RecvTmpBuf[i]);
////	}
////	
////	/* re-use dma+idle to recv */
////	HAL_UARTEx_ReceiveToIdle_DMA(&huart1, g_RecvTmpBuf, 10);
////}
//void Wait_Rx_Complete(void)
//{
//	while (g_rx_cplt == 0);
//	g_rx_cplt = 0;
//}

//void StartUART1Recv(void)
//{
//	/* init circle buffer */
//	circle_buf_init(&g_uart1_rx_bufs, 4096, g_RecvBuf);
//	
//	/* use dma+idle to recv */
//	HAL_UARTEx_ReceiveToIdle_DMA(&huart1, g_RecvTmpBuf, 256);
//}

//int UART1GetChar(uint8_t *pVal)
//{
//	return circle_buf_read(&g_uart1_rx_bufs, pVal);
//}

//void HAL_UARTEx_RxEventCallback(UART_HandleTypeDef *huart, uint16_t Size)
//{	
//	static uint16_t head = 0;
//	
//	if(huart == &huart1)
//	{
//		if(head >= huart->RxXferSize)
//		{
//			head = 0;
//		}
//	//	head &= 0xff;
//		while(head != Size)
//		{
//			circle_buf_write(&g_uart1_rx_bufs, g_RecvTmpBuf[head++]);
//		}
//	}
////	for (int i = 0; i < Size; i++)
////	{
////		circle_buf_write(&g_uart1_rx_bufs, g_RecvTmpBuf[i]);
////	}

//	/* re-use dma+idle to recv */
////	HAL_UARTEx_ReceiveToIdle_DMA(&huart1, g_RecvTmpBuf, 10);
//}

/* USER CODE END 1 */
